Nios 2 to custom component communication

If you haven't done yet, you need an Avalon MM slave wrapper, for example refer to the Avalon-MM Slave template you find here:

http://www.altera.com/support/examples/exm-list.jsp?cat=embedded

You must connect your control signals to user_data registers bits, so you will control your block functions by writing or reading the related registers, like a common microcontroller peripheral.

For example:

user_datain_0 (control register) : bit0=start, bit1=reset ....

user_dataout_0 (status register) : bit0=conf_code, bit1=packet_ready

user_dataout_1 (data register) : connect to data_packet

Regards